Switch-lock.



T. LYGETT@ C. D. HGUSEMAN.

SWETCH LUCK.

APPLIQATION FILED MAR. e, 1908.

Patented. Mai. 2, i909.

QHHHHVIHHHHH v Witness@ ATHOMAS LYCETT AND CHARLES DIKSON HOUSEMAN, OFGASTONVILLE, PENNSYLVANIA.

SWITCELLCK.

Specification of Lettere Patent.

Patented March a, ieee.

Application filed March 6, 1908. Serial No. 419,595.

To all 'whom it may concern:

Bc it known that we, THOMAS Lfcicr'r and lHARLns Bronson lloUsEMAN,citizens of the United States oi America, residing at Gastonville, inthe Acounty of Washington and State of Pennsylvania, have inventedcertain new and useiul Improvements in Switch-Locks, oi which thefollowing is a specification, reference being had therein to theaccompanying drawing.

This invention relates to switch locks,A and the primary object of ourinvention is to provide simple and effective means for hold ingn aswitch arm in a lined position, whereby a railway,r switch cannot bemisplaced or tampered with.

A still further object of our invention is to`p'rovide a simple andinexpensive switch lock that can be easily and quickly mani ulated torelease a switch arm or hold t ie same in a fixed position.

With the above and other objects in view which will more readily appear'as 4theinventionis better understood, the same consists in the novelconstruction, combination and 'arrangement oi' parts to be presentlydescribed and then Specificallyr pointed 4out in the appended claims.

ln the drawings z-Figure 1 is a plan of a switch equipped with ourimproved'lock, Fig. 2 is a front elevation oi'our switch lock, partlybroken away, and partly in section, Fig. 3 is a side elevation oi thesame, partly broken away and partly in section, Fig. 4 1s an elevationof a semaphore switch equipped with our lock, and Fig. 5 is aperspective vie-wot' one of the pins used in connection with the lock.

In the accompanying drawings,- 1 designates a track supported upon ties2, some of which extend to one side of the track to provide bearings 3for a crank shaft 4 having a switch arm 5, this switch arm beingemployed to move the switch tongues 6 b virtue oi a rod 7 connectingwith the oran i shaft 4.

Adjacent to the 'shaft l we locate our switch lock for holding the arm 5in a fixed position. The switch lock comprises a standard 8 slotted, asat 9, to receive the switch arm 5. .l The standard is recessed as at 10,and bifurcated as'at 11, for a pivoted latch 12, said latch having asuitable latch f 13. vThe latch '12 is provided in its outer face with aconcavity 14 for an arm 15, said arm being pivoted within the concavityby a pin 16. Pivotally connected to the ends of the arm 15 are pins .17,said ypins extending through the sides oi the latch to engage inrecesses 18 provided therefor in the standard 8. The ends of' the pins17 are beveled, an at 19, whereby the latch can be swung to a 'closedposition and locked. The pins 17 are plate 22 is'provided with a keyhole 24 for' the insertion of a suitable key (not shown), the key beingadapted to engage in thekey recess 25 provided therefor in the arm 15.To cushion the closing movement of the latch 12, we employ a coil spring26, which ie mounted in the recess 10 of the standard 8.

When the latch 12 is locked in the closed position as illustrated in'Figa 2 and 3 oi the drawingait is impossible orthe switch arm 5 to beremoved from the standard, without the use of a key. By inserting thekey in the key hole 14, the arm 15 can be movedA to withdraw the pins 17from the recesses 18 of the standard 8, and then the handles 13 of thelatch can be elevated, to clear said latchl from the slot 9 and permitof the arm 5 being elevated to move the switch tongue .ln Fig. 4 of thedrawings, we have convenionally illustrated a semaphore switch 27 ashaving the support 28thereoi provided with our switch lock, the Standard8 thereof being bolted or otherwise secured to said support.

Vile reserve the right to use two .locks in connection with a switch forlocking the switch arm in either position, but such an arrangement oithe locks is very seldom nec ess'ary, as the switch is generallyreturned to its original position after being used.

It is thought that our invention will. be fully understood from theforegoing description taken in connection with the` drawings,

and we reserve the right to make auch structural changes asarepermissible by the-ap? pended claims.

Having now described our inventionwhat we claim as new,'is:-

1. The combination with a switch arm, odi: G

a slotted standard adaptedto receive sai arm, said'standardvbeingbifurcated andrecessed, a latchpivotally mounted in the b1- vspring-pressed beveled 'pins pivotally oongagging eaid arni and movil 1gsaid pine lroin tially as described.

erin loca ted Within. said colmavity for moving` letarnlard to maintainthe latch in inclined finzcation oi said Standard and adapted to extendintesa-icl elet, a spring located in the recess of said standard 'forcuehioniw` said latch, a pivoted erin located in said Llatch,

iieeted to the ends of said arm and adapted to engage in said standardfor holding said iatch in. a closed position, and means 'for enengagement with said standard, substan- The conihination with a switcharm, of a slotted standard adapted to receive said ari'n, a pivotetllatch .mounted in said standard and adapted to hold said afin therein,Said latch having a eoncevity formed therein, epi'ingmreseed lievcledvnies ,mountedlin said conczwity for engaging in. :mill standard andholding said latch in. a closed licei fon, and an of en gage-hund iw 1thsaid standpoeitioh, said pine movable in opposite direceee tions withrespect to each other and means arranged within said latch for shiftingsaid pins troni position of locking en agement to release the latch soas to enabe the with drawal oi the arm from the standard.

4. The combination with a Switch arm, of

a slotted standard adapted to receive said ai'rn, a normally inclinedlatch pivoted in Said standard and provided with a nose for maintainingthe arni within the standard, spring pressed elidahle pins mounted insaid latchv and adapted to be projected laterally there vfrom forlocking en agement With the stand ard to maintain the atchiin inclinedposition, said pins movable in opposite directions with respect to eachother, means arranged Within said latch for shifting said pins fromposition' of looking engagement to release the latch eo as to enable theWithdrawal of the arm from the standard, and means engaging the saidlatch to canse it to assume an inclined posi- .tion and 'to position thenose of the latch over the arm, said latch provided with a handlepermanently arranged clear of the standard.

ln testimony whereof We aiiix our signa- Jturce in the presence of twowitnesses.

THOMAS tiener. CHARLES morsen HOUSEMAN.

Vflitnesses;

A L. HENRY, Gmo. WYNN.

